从β-羟基酸酯脱水制备α,β-不饱和酸酯的方法中经常伴有β,γ-不饱和酸酯的生成.与此相反,烷氧羰基亚甲基三苯基胂与脂族酮反应,生成纯的α,β-不饱和酸酯.后一反应的产物经核磁共振谱证明系顺、反异构体的混合物.甲氧羰基亚甲基三苯基胂经热裂可得反式丁烯二酸二甲酯和环丙烷1,2,3-三羧酸三甲酯. In the dehydration of β-hydroxy acid esters, α, β-unsaturated acid esters are often accompanied by the formation of β, γ-unsaturated acid esters. In contrast, alkoxycarbonyl methylene triphenylarsines and aliphatic Ketone reaction to generate pure α, β-unsaturated acid ester. The latter reaction product was confirmed by nuclear magnetic resonance system, anti-isomer mixture. Methoxycarbonyl methylene triphenyl arsine by thermal cracking available Dimethyl fumarate and cyclopropane 1,2,3-tricarboxylate.